Pumping apparatus



Jan. 8, 1963 J.. lsRl-:ELI

PUMPING APPARATUS Filed Dec. s1, 1958 2 Sheets-Sheet 1 A T TOP/M6745 Jan. s, 1963 J. ISREEU 3,072,296

PUMPING APPARATUS Filed Deo. 3l, 1958 2 Sheets-Sheet 2 FIG. 4 m j 92 FIG. 5

. INVENTOR.

BY M add-f2 L Unite States Patent Office Edilggb iatented Jian. 8, i953 3,072,296 PUMPNG APPARATUS dach Isreeli, Tucirahoe, NX., assigner to Technicon Instrumento Corporation, Chauncey, N.Y., a corporation of New Yori;

Fiied Dec. 31, 1958, Ser. No. 784,123 11 Ciairns. (Cl. 222-132) This invention relates to pumping apparatus.

One object of the present invention is to provide purnp ing apparatus which is especially well adapted to accurately measure and pump small quantities of uids having such characteristics as to require the use of special materials which are inert upon contract with said fluids, as for example, but without limitation, such fluids as acids, certain solvents, certain alkalis and reagents, etc.

Another object of the present invention is to provide means to permit the use of a proportioning pump, of the resiliently flexible tube type, for metering and pumping fluids which normally damage or destroy the tubes of the proportioning pump.

A furthetr object of the present invention is the provision of pumping apparatus wherein a proportioning pump may be used for pumping fluids which normally have adverse effects on the tubes and parts of ordinary pumps, and to provide for the pumping of such fluids either alone or concurrently with innocuous fluids in predetermined accurately measured relative portions, in either case, without any detrimental effects on the tubes or parts of the pump.

A still further object of the present invention is to provide a pumping apparatus having a first pump for pump ing one fluid, a second pump for pumping a different fluid, and means interconnecting said two pumps for operating said second pump under the control of said rst pump in proportion to the quantity of fluids pumped by said first pump.

Another object of the present invention is to provide, in a pumping apparatus, a pump comprising a rigid container or bottle providing a first chamber therein and a removable closure member or pump device mounted on said container to provide a second chamber for said pump isolated from said first chamber, and means for introducing liquids into said second chamber for pumping liquids from said first chamber in quantities equal to the liquids introduced into said second chamber.

A still further object of the invention is to provide improved pumping apparatus, for pumping proportionate quantities of various normally destructive fiuids, which is simple in construction and operation. g

The above and other objects, features and advantages of this invention will be fully understood from the following description considered in connection with the accompanying illustrative drawings of the presently preferred embodiment of this invention.

In the drawings:

FIG. 1 is a diagrammatic view of a pumping apparatus, pursuant to the present invention, employed in a fluid processing or analysis system;

FIG. 2 is a vertical sectional view, on an enlarged scale, taken on line 2 2 ot FIG. 1, showing the pump of the present invention, ready to commence pumping of destructive fluids;

FIG. 3 is a vertical View, partly in section, showing the pump of the present invention near the completion of the pumping operation;

FIG. 4 is a diagrammatic view, taken in the direction of line 4 of FIG. 1, showing the proportioning pump in the open position thereof to permit the venting of air from the pump of the persent invention;

FIG. 5 is a vertical view `of a container or bottle which provides a chamber for the pump of the present invention,

with a cap thereon;

FIG. 6 is a vertical View of a removable pump device for the bottle shown in FIG. 5; and

FIG. 7 is an enlarged detailed view, in section, of a combined coupling and check valve for some of the lines.

Referring now to the drawings in detail and particularly to FIGS. 1 and 2, the pumping apparatus of the present invention comprises a proportioning pump 1li which delivers pumped iluids to a second pump 12 for operating said second pump under the control of the proportioning pump. Pump l2 includes a bottle or other suitable container 14, having a fluid therein, which is discharged therefrom in quantities equal to the pumped iiuids delivered by proportioning pump it) to pump l2, as will be more fully understood from the following detailed description of the invention.

Proportioning pump iti is provided with a platen i3 resiliently mounted on a base support 15 by springs 16. Suitably mounted on platen 13 are a plurality of resiliently flexible tubing members 1d, Zd and 22, which are preferably made of a suitable plastic material, as for eX yample Vinylite Mounted above the tubing members, and extending transversely thereof, are a plurality of pressure rollers 2d which are carried in spaced relation by sprocket chains 26 to which they are attached, at each end thereof. The sprocket chains are supported on sprocket wheels 2S and 30 which are supported in a frame 32. Suitable driving means (not shown) tare connected to a shaft 34 for driving sprocket wheels 28, said sprocket wheels being mounted on said shaft for causing the rollers 24 to progressively compress the tube members 1d, 20 and 22, simultaneously along their lengths for pumping fluids therethrough. Driven sprocket wheels 3u are also mounted on a common shaft 36. The assembly of rollers and sprocket chains may be lifted off the flexible tubing members, as shown in FiG. 4, by unlatching wing screw 38 and rotating the assembly about its hinged pivot di?. A pump of this type is described in U.S. Patent No. 2,893,324 issued July 7, 1959, to the assignee of the present application.

As will be understood from the said patent, the iiexible tubing members of the proportioning pump may be of different internal diameters in order to transmit fluids in correspondingly different quantities. However, said tubes have the same wall thickness so that all of them are fully compressed by the same transversely extending pressure rollers 24'. in many instances, the tuhes are of very small diameter, for example, between 0.030 inch to about 0.081 inch, and the volumes of fluids pumped per minute are correspondingly small, ranging from about 0.32 ml. per minute to about 2.5 ml. per minute, the pumping rate varying according to the speed of the pump. It will be understood, however, that the subject invention is also useful for pumping fluids through larger diameter tubes and at various other rates.

it will be understood that movement of rollers 2dover flexible tubing members 1S, ZG and 22;, longitudinally thereof, simultaneously compresses the tubing members progressively along their lengths causing proportionate quantities of liuids to be pumped into, for example, a process or analysis system, such as indicated at d2. System t2 may involve an analysis system for determining various substances contained in iiuids being analyzed such as the process system disclosed in U.S. Patent No. 2,797,149. As described in said patent, successive iiuid samples are processed by a system, as 42, to develop a coior therein indicative of a substance contained in sai-:i fluid being analyzed. The colored fluids are delivered to a flow cell de, wherein gases are removed from said colored fluids and the colored fluids subsequently undergo colorimetric analysis in the colorimeter da, the results of said Si analysis being recorded on the recorder d8. At Irhe completion ot the colorimetric analysis the fluids are discharged from the colorimeter at 50. Further discussion of the processing system, the colorirneter and the recorder, is not considered necessary since they do not, per se, :form part of the present invention.

ln many cases, depending upon the type of analysis or iiuid treatment involved, various iiuids are required to be used which are corrosive or harmful to the flexible tube members or other parts of the proportioning pump lil and, ac ordingly, it is iis-.portant that these iiuids do not pass directly through the pump. Pursuant to the present invention means are provided wherein these destructive iluids are not requ'red to pass through the flexible tube members of the proportioning pump t) but will still be pumped and delivered in proportional quantities to the processing system 42.

Referring now to FIG. l, it will be noted that three tube members, namely, tubes l, 26* and 22 are shown being actuated by the proportioninf7 pump lll. It will be understood that these tubes are representative of a number of tubes for any particular processing or analysis that may be accomplished and that more or less tubes may be employed. Tubing members Ztl and 22 contain innocuous fluids which are not harmful or destructive to the tubing members or parts ot the proportioning pump and, accordingly, are connected directly to the processing system 42 via tube member 52, coupling Se being provided to connect tube members Ztl and 22 to said tube member. Tube member 2t? may carry the samples of the iluid desired to be analyzed or processed While tube member 22 may carry air so as to divide the uid samples into separate segments to provide a segmented fluid stream for the processing system d2, as indicated in US. Patent No. 2,797,149. Tube member 1S would normally carry an acid or other liquid reagent for reacting with the iluid samples tlowing in tube 2%. However, since this acid or reagent would shortly corrode or destroy the flexible tube members of the proportioning pump, other pump means, as the previously mentioned pump l2, is employed for pumping these destructive fluids. Pump l2 is interposed in ilexible tubing line i8 and is provided with an outlet tube 58 which is connected to tube member 2G by coupling `60. When corrosive or destructive lluids are required to be pumped, as well as innocuous fluids, in proportional quantities, proportioning pump lll will pump through tube member 20 the fluid samples, through tube members 22 air, both innocuous lluids, and other innocuous lluids, such as ethylene glycol, will be pumped through tube member 18, the corrosive or destructive acids or liquid reagents being pumped by pump l2, under the control of proportioning pump lll. Proportioning pump l@ pumps an actuating lluid through tube member 18 to operate pump 12, which will. be more fully understood from the following description. It will be understood that the number of tubes shown in FlG. 1 is for illustrative purposes only and that more or less tubes may be employed as well as additional pumps, similar to pump l2, depending upon the process or analysis involved.

Referring now to FIG. 2, pump l2 comprises a rigid cylindrical container or bottle E4, previously mentioned, preferably mad-.e of glass, or other suitable material which is inert to corrosive liuids, having a wide mouth opening 64, at the neck thereof, said neck being provided with the usual threads 66. Bottle 14 contains the liquid reagent or other destructive iluid 63 required to be pumped in i proportional quantities to react with the iluid samples in the process system 42. Removably mounted on the threaded neck portion of container M is a pump device, generally designated by the reference numeral 68, which is preferably made from a suitable plastic, such as polyethylene. Pump device 63 includes a cap or closure member 7b provided with threads 72 which engage the threads 66 of container 14 when pump device 63 is mounted thereon. The upper part of cap 7G mounts a portion of a tube '71E- to which is mounted, at the lower part thereof,

an enclosed member or bag-like receptacle 76, adapted to be inserted container' irl through opening 642i, said tube and bag also preferably being made from polyethylene. Tube 74 is provided, at the lower end thereof, with a llange 7S to which the upper peripheral edge portion Sii or" bug 75 is fused, by heating, said bag being provided with a seal ring 82 to insure a good connection between said tube and said bag. ri`he bag 75 is normally evacuated and the upper portion of tube 7e is closed, as at 84, to uc against loss or" vacuum. The bag-like receptacle 76 in its collapsed condition occupies very little space when inse d into the container 14, the disposed position of the bag .n the container being shown in FIG. 2. In order to insure against any significant resistance to movement of actuating fluid from the proportioning pump l@ and to proportioning pump, the bag 76 should be nonetchable and flaccid. ln addition, it is necessary that e bag be chemically inert to the destructive fluids and sag-ents in contact therewith in container ld. Accordbag 76 should be made from a material that is comic'ely insensitive to practically all iluids, er' mples ol' such materials being polyethylene and polytetranouroethylene.

'lhe upper part of cap 7G is also provided with an outlet tube S6 to which is connected the previously mentioned tube member 5S which goes to the processing system 42. Said outlet tube is also preferably made of polyethylene. Tube member 18 is in lluid communication with the interior of bag 76, through a hypodermic needle 88, to Which it is fastened, at one end thereof, the pointed end of said needle piercing the side Wall of tube 74, at 96, as clearly shown in FlG. 2. Tube i8 is supplied with an innocuous fluid, such as ethylene glycol, which has no detrimental etects on the tubing members of the pump, the supply being shown in FlGS. l and 4 as a bottle 92 containing said liquid. The innocuo-us fluid should preferably have a low vapor pressure. The liquid supply in bottle 92 should also be of a type which does not react with the acid or liquid reagent contained in bottle ld. This is important because, during an extended period of operation of pump l2, some of the innocuous liquid which has been pumped into `bag 7o by proportioning pump itl may, because of the extended time said liquid is in said bag, diffuse through the bag and mix with the acid or liquid reagent in the bottle. Ethylene glycol is a nonlimitative example of `such a suitable liquid. Bottle 92 is provided with a two-hole stopper 94, the other end of tube 1S passing through one of said holes and being immersed in the innocuous fluid, the other of said holes providing an air vent 93 for the supply bottle 92. Tube member 18 is also provided with a bulb or hand pump 96 which is provided with a stop cock or pinch clamp 98 which may be closed to isolate the hand pump from tube 1S.

Normally, the container 1d and the pump device 68 will be shipped separately, as shown in FIGS. 5 and 6, the acid or liquid reagent being furnished in said container, said ycontainer having the usual cap lili?. Since bag 76 will be evacuated, the pump device 6? for container 14' will preferably be packed in a receptacle that has been substantially evacuated to aid in the retention of the vacuum in bag 76 during long periods of storing or shipping.

Pump l2 operates in the following manner:

Cap lili) is removed from container lll and pump device 63 is screwed on threads 66 of the neck portion of the container, the bag '76 being inserted through the mouth opening 64 of the container into liquid reagent d3. In this assembled condition of pump i2, bag 76 provides a iirst or inner chamber for pump i2, the container ld providing a second or outer chamber surrounding and enclosing said inner chamber. Prior to the piercing of tube 74 by hypodermic needle S3 to connect tube l@ with the bag 76, pinch clamp 9S on hand pump @o will be opened and the pump and the tube l Will be filled with innocuous liquid, such as ethylene glycol, from supply 92,

thereby insuring the removal of all air in said tube and said pump. To do this, the rollers and sprocket chain assembly of proportioning pump lll will be lifted oil platen i3 by opening screw 3S and pivoting said assembly about its hinged pivot di), as shown in FIG. 4. The supply bottle 9?. will then be lifted and tilted, into the position shown in solid lines in PEG. 4, to lill tube i3 and bulb 96 with ethylene glycol, any air in said members being removed through the opening N2 in hypoderrnic needle 83 or through the vent 93 provided by the other hole in stopper 534i of bottle 92. After the removal of all air, hypodermic needle 83 may be inserted through the side wall portion ot' tube '74 to connect tube member i8 with the interior of bag 76, said tube then being in iluid communication therewith. It will be noted that since bag 76 has been evacuated, there is no air required to be removed therefrom. However, there will be a certain quantity of air contained in bottle ld which is required to be removed prior to any pumping -by proportioning pump l so that liquids introduced into bag 75 will displace or pump an equal quantity of acid or liquid reagent from bottle 14. This air may be easily removed by permitting innocuous Huid from supply bottle 92 to dow, by gravity, into bag 76, the supply bottle being. held in the elevated position shown in HG. 4. if desired, positive pumping of uid into bag '76 may be accomplished by manual actuation of bulb 9d. As uid from supply bottle 92. enters bag 76, an equal quantity of iiuid will be displaced or pumped from container i4 so that the liquid reagent in the container will rise and force out any air therein through outlet 86. This manual venting operation may be continued until the liquid level in container 14 rises to the top of outlet 36, at which time all the air will have been vented from the pump. At that time, pinch clamp 98 is closed and the roller and sprocket chain assembly is lowered by pivoting7 said assembly about hinged pivot dil whereupon the rollers will engage the flexible tube members of the pump and rest on platen i3 ready for the pumping operation.

At this time the supply bottle 92 will be lowered into position for pumping operation, said position being shown in dotted lines in FIG. 4. The pumping apparatus is now ready for operation. Upon actuation of proportioning pump iti, the rollers 24 will continuously move over the flexible tubing members lf, Ztl and 22 progressively compressing them along their length to pump proportionate quantities of fluid therethrough. innocuous tluid from supply bottle 92 will be pumped, by the proportioning pump, through tube member TLS into bag 7-5 of pump l2, wherein an equal quantity of liquid reagent 63, in container iai, will be displaced or pumped therefrom, through outlet 36, into tube member S8, wherein said liquid reagent will join the fluid samples being pumped through tube member Ztl, at coupling 6d. Slightly downstream of said flow the mixed fluids will be segmentized by the air stream. being pumped by proportioning pump l@ through tube member Z2, said segmentation being accomplished at coupling d wherein a segmented l'luid stream will iiow to the processing system d2 via conduit 52.

Thus it will be seen that there has been provided, in a pumping apparatus, pump means wherein equal quantities of actuating liquid from a proportioning pump cause equal quantities of liquid in the pump means to be discharged from said pump means and wherein the pumped liquids do not corne in Contact with any of the tubing members of the propo-rtioning pump. ln addition, the quantity of liquid pumped by pump 12 is proportional to the quantity of Fluids being pumped by the proportioning pump.

The aforesaid pumping operation may be continued until bag 76 is iilled with innocuous iiuid so that the bag is in contact with the inner wall surfaces of container 14. This condition of pump i?. is shown in FiG. 3, wherein the pumping operation has been nearly completed and bag 76, which is filled with the innocuous iiuid indicated as 196, is in Contact with the inner wall surfaces of container 14, except at the upper portion thereof. Preferably, bag 75 should be of the same size as the interior of container ld so that after having been iilled, additional duid attempted to be pumped therein will be resisted by the rigid walls of the container thereby precluding the possibility of breakage of the bag. in addition maximum utilization of the space within the container will result. lf the operation of pump l2 is stopped prior to the completion of the filling of the bag 76, wherein bag 76 is in an intermediate stage, having been lled so that it may no longer be lifted through the relatively narrow opening 4 at the neck portion of the bottle, it is preferable that pump device 6d be removed from container 14 until it is desired to operate pump l2 once again. if the bag 76 remains in the bottle i4 for any appreciable length of time, liquids in bag 76 will begin to dii-*ruse through the material of the bag into the liquid reagent 63, which may be avoided by removing the pump device 693 from the bottle during the inoperative periods of the pump. Accordingly, the upper portion of outlet tube 74 may be cut away, below the closed part 34 thereof, and the liquid in bag 76 may be drained therethrough. When the bag 76 has been drained enough so that it may pass through the opening 6dof the bottle, pump device o3 may be removed from the pump, washed and stored away until further use is made of the pump, tube member it having been previously disconnected from tube 74.

When it is desired to use pump l2 again, pump device 68 may be remounted on container llt and tube member 18 may be reconnected to bag 76 by piercing the side wall of tube 7d, as previously described, by using hypodermic needle 3S. rthe air in bag '76 may be vented through the opening now existing in tube '74 by introducing uid therein from supply bottle 9.2, in the same manner as pre viously described, until the liquid level in bag 76 rises to the opening in tube 7d, wherein said opening may then be closed by a suitable clamp. The air may then be vented from container i4 inthe same manner as previously described in connection with PEG. 4. Upon completion of the venting of air from container lid, pump 12 is again ready for pumping operation. To avoid the steps of venting bag 76 and the necessary resealing of tube 7d, the pump device 68 may be discarded when removed from the container 14 and a new pump device may be employed, if desired.

It will be noted that at the junction where the tube members meet, combined T couplings 54 and di) have been provided, each of said couplings having a check valve M4, similar to the one shown in FlG. 7, in the legs of the couplings connecting tube members 22 and 20, respectively. When proportioning pump ll is stopped by lifting the assembly or" rollers and sprocket chains o the iiexible tubing members i8, 2b and 22, as shown in FIG. 4, a suction will be created in said tube members due to the release of the pressure of the rollers 24 on these tube members thereby possibly causing destructive liquid reagents to back up into tube member Ztl or 22. This is undesirable, since tube members it@ and 22 would normally be made from a suitable flexible vinyl plastic, as previously mentioned, which would be adversely aiiected by the destructive liquids in tube members 52 or 58. This adverse condition is avoided by the provision ot' check valves 10din T couplings 54 and 60, coupling 5d being shown in FIG. 7. These T couplings may preferably be made from glass. Accordingly, it will now be impossible for lluid to iiow back from tube member 52 into either tube member 2@ or 22 nor would it be possible for destructive fluids in tube member 53 to ow back into tube member 20.

The subject matter ot this application is related to my U5. application, Serial No. 752,5l6, tiled August l, 1958, now abandoned.

While l have shown and described the presently preferred embodiment of the invention, it will be understood aovaase that the invention may be embodied otherwise than as herein specifically illustrated or described, and that in the illustrated embodiment certain changes in the details of construction and in the form and arrangement of parts may be made without departing from the underlying idea or principles of the invention. Accordingly, i do not wish to be limited to the precise construction shown or described herein, except as may be required by the scope of the appended claims.

Having thus described my invention, what l claim and desire to secure by Letters Patent is:

l. Pumping apparatus, comprising first pump means having a plurality of resiliently flexible tube members for pumping a plurality of fluids in proportional quantities, one of said fluids being a liquid, said first pump means having means for progressively corn-.pressing said tube members along their lengths or pumping said fluids respectively, therethrough, second pump means for pumping a liquid, and fluid passage means interconnecting the flexible tube member for the liquid from said first pump means and said second pump means for operating said second pump means under the control of said first pump means so that the quantity of the liquid pumped by said second pump means is the same as the quantity of said liquid pumped by said first pump means whereby the quantities of the fluids pumped by said first and second pump means are proportional.

2. Pumping apparatus, comprising first pump means having a plurality of resiliently flexible tube members for pumping a plurality of fluids, respectively, said first pump means having means for progressively compressing said tube members simultaneously along their lengths for pumping said fluids therethrough in proportional quantities, second pump means for pumping a different fluid than said first pump means, and fluid passage means interconnecting said first pump means to said second pump means for oper-ating said second pump means under the control of said first pump means, whereby the quantity of fluid pumped by said second pump means is in proportion to the quantities of the fluids pumped by said first pump means.

3. Pumping apparatus, comprising first pump means having a plurality of resiliently flexible tube members for pumping a plurality of fluids, respectively, said first pump 'means having means for progressively compressing said tube members simultaneously along their lengths for pumping said fluids therethrough in proportional quantities, second pump means for pumping a different fluid than said first pump means comprising a container providing a first chamber for said different fluid, means removably fastened to said container to provide a second chamber for said container isolated from said first chamber, and fluid passage means interconnecting one of said flexible tube members of said first pump means to said second chamber for operating said second pump means under the control of said first pump means, whereby the 'quantity of fluid pumped by said second pump means is in proportion to the quantities of the fluids pumped by said first pump means.

l 4. Pumping apparatus, comprising first pump means for pumping one liquid and another fluid simultaneously in proportional quantities, second pump means for pumping a different liquid, and means interconnecting said two pump means for operating said second pump means under the control of said one liquid pumped by said first pump means, said second pump means comprising a rigid container, non-stretchable and flaccid means separating said .container into two chambers, said interconnecting means connecting one of said chambers to said first pump means vfor receiving said one liquid pumped by said first pump means, and outlet means in the other of said chambers for discharging liquid therefrom in quantities equal to the quantity of said one liquid flowing from said first pump means into said one chamber, whereby the quanti- Cil 8 ties of the fluids pumped by said first and second pump means are proportional.

5. Pumping apparatus, comprising first pump means for pumping one liquid and another fluid simultaneously in proportional quantities, second pump means for pumping a different liquid, and means interconnecting said two pump means for operating said second pump means under the control of said one liquid pumped by said first pump means, said second pump means comprising a rigid contaner, means separating said container into two chambers, said interconnecting means connecting one of said chambers to said first pump means for receiving liquid pumped by said first pump means, and outlet means in the other of said chambers for discharging liquid therefrom in quantities equal to the quantity of said one liquid llowing from said first pump means into said one chamber, whereby the quantities of the fluids pumped by said first and second pump means are proportional, said separating means being non-stretchable and substantially completely flaccid and freely yieldable to the pressure of said one liquid from said first pump means.

6. Pumping apparatus, comprising first pump means having a resiliently flexible tube member for pumping one liquid and means for progressively compressing said tube member along its length for pumping said one liquid therethrough. second pump means for pumping a different liquid comprising a rigid container, non-stretchable and flaccid means separating said container into a first chamber defined by said non-stretchable and flaccid means and a second chamber surrounding said first chamber, liquid passage means interconnecting said flexible tube member and said first chamber to receive said one liquid transmitted through said flexible tube member, and outlet means in said second chamber for discharging said different liquid therefrom in quantities equal to said one liquid flowing from said first pump means into said first chamber.

7. Pumping apparatus, comprising first pump means having a resiliently flexible tube member for pumping one liquid and means for progressively compressing said tube vmember along its length for pumping said one liquid therethrough, second pump means for pumping a different liquid comprising a rigid container, means separating said container into a first chamber defined by said nonstretchable and flaccid means and a second chamber surrounding said first chamber, liquid passage means interconnecting said flexible tube member and said first chamber to reecive said one liquid transmitted through said flexible tube member, and outlet means in said second chamber for discharging said different liquid therefrom in quantities equal to said one liquid flowing from said first pump means into said first chamber, said separating means being non-stretchable and substantially completely flaccid and freely yieldable to the pressure of the liquid from said first pump means.

8. Pumping apparatus, comprising a nrrportioning pump having a plurality of resiliently flexible tubes for pumping a purality of fluids in proportional quantities through said tubes, respectively, one of said fluids being a liquid and pump means in fluid flow communication with said tube for said liquid to receive pumped liquid from said proportioning pump, said pump means comprising a rigid container, non-stretchable and flaccid means dividing said container into two chambers` one of said chambers being initially a vacuum, means for interconnecting said one chamber to said one tube for said liquid from said pronortioning pump` wherebv saidliquid from said one tube is pumped into said one chamber during the operation of said nroportioning pump, said other chamber having outlet means for discharging liquid therefrom in quantities which are equal to the quantities of said pumped liquid flowing into said one chamber. whereby said discharged liquid is pumped through said outlet means in quantities which are in proportion to the quantities of the fluids pumped by said proportioning pump.

9. Pumping apparatus, comprising a proportioning pump having a plurality of resiliently ilexible tubes for pumping a plurality of fluids in proportional quantities through said tubes, respectively, one of said fluids being a liquid and pump means in fluid flow communication with said tube for said liquid to receive pumped liquid from said proportioning pump, said pump means comprising a rigid container, non-stretchable and accid means insertable into said container for dividing said container into two chambers, said non-stretchable and iiaccid means being formed of fluid-impervious material and being freely yieldable to the pressure of the pumped liquid from said proportioning pump, one of said chambers being initially a vacuum, means for interconnecting said one chamber to said one tube for said liquid from said proportioning pump, whereby said liquid from said one tube is pumped into said one chamber during the operation of said proportioning pump, said other chamber having outlet means for discharging liquid therefrom in quantities which are equal to the quantities of said pumped liquid ilowing into said one chamber, whereby said discharged liquid is pumped through said outlet means in quantities which are in proportion to the quantities of the fluids pumped by said proportioning pump.

10. Pumping apparatus, comprising a proportioning pump having a plurality of resiliently llexible tubes for pumping a plurality of uids in proportional quantities through said tubes, respectively, one of said tluids being a liquid, and pump means in fluid ow communication with one of said tube for said liquid to receive pumped liquid from said proportioning pump, said pump means comprising a rigid container for a liquid and having an opening therein, a pump device removably mounted to said container and having a bag-like receptacle depending therefrom and disposed in said container through said opening to form a rst chamber within said container surrounded by a second chamber formed by said container, said pump device having an outlet opening in liquid ow communication with said second chamber for the passage of liquid from said container and an inlet opening in liquid tlow communication with said first chamber for receiving the liquid pumped through said tube for said liquid from said proportioning pump, said last mentioned tube being connected to said inlet opening, whereby liquid pumped into said bag-like receptacle from said proportioning pump through said inlet opening causes said receptacle to expand and pump a quantity of the liquid in said container through said outlet opening which is equal to the quantity of liquid pumped into said bag-like receptacle so that the quantity of the liquid pumped by said pump means is in proportion to the quantities of the iluids pumped by said proportioning pump.

11. Pumping apparatus, comprising a first pump for pumping at least one liquid and another fluid simultaneously in proportional quantities, a second pump for pumping a dilerent liquid, and liquid passage means interconnecting said rst and second pumps for operating said second pump'by said one liquid pumped by said first pump so that the quantity of the liquid pumped by said second pump is the same as the quantity of the liquid pumped by said first pump, whereby the quantitles of the uids pumped by said first and second pumps are proportional.

References Cited in the iile of this patent UNTED STATES PATENTS 233,570 Stafford Oct. 19', 1880 1,256,127 Gould Feb. 12, 1918 1,939,611 Purvis Dec. 12, 1933 1,979,605 Charmat Nov. 6, 1934 2,063,430 Graser Dec. 8, 1936 2,283,100 Shores May 12, 1942 2,333,451 Sussman et al Nov. 2, 1943 2,466,618 Stocks Apr. 5, 1949 2,529,937 Hale Nov. 14, 1950 2,659,516 Smith Nov. 17, 1953 2,804,018 Ryder et al Aug. 27, 1957 2,807,213 Rosen Sept. 24, 1957 2,876,768 Schultz Mar. 10, 1959 FOREIGN PATENTS 2,406 Great Britain Aug. 11, 1869 15,158 Great Britain July 26, 1901 145,716 Austria May 11, 1936 429,612 Great Britain June 4, 1935 

1. PUMPING APPARATUS, COMPRISING FIRST PUMP MEANS HAVING A PLURALITY OF RESILIENTLY FLEXIBLE TUBE MEMBERS FOR PUMPING A PLURALITY OF FLUIDS IN PROPORTIONAL QUANTITIES, ONE OF SAID FLUIDS BEING A LIQUID, SAID FIRST PUMP MEANS HAVING MEANS FOR PROGRESSIVELY COMPRESSING SAID TUBE MEMBERS ALONG THEIR LENGTHS FOR PUMPING SAID FLUIDS RESPECTIVELY, THERETHROUGH, SECOND PUMP MEANS FOR PUMPING A LIQUID, AND FLUID PASSAGE MEANS INTERCONNECTING THE FLEXIBLE TUBE MEMBER FOR THE LIQUID FROM SAID FIRST PUMP MEANS AND SAID SECOND PUMP MEANS FOR OPERATING SAID SECOND PUMP MEANS UNDER THE CONTROL OF SAID FIRST PUMP MEANS SO THAT THE QUANTITY OF THE LIQUID PUMPED BY SAID SECOND PUMP MEANS IS THE SAME AS THE QUANTITY OF SAID LIQUID PUMPED BY SAID FIRST PUMP MEANS WHEREBY THE QUANTITIES OF THE FLUIDS PUMPED BY SAID FIRST AND SECOND PUMP MEANS ARE PROPORTIONAL. 